Gamma-butyrolactone (gbl) Product name: gamma-butyrolactone Cas no: 96-48-0 Chemical formular: c4h6o2 Grade: 99.5% & 99.0% Appearance: transparent liquid in the shape of oil. Grade: min 99.8% &min 99.5% Density (g/ml) 1.124-1.131 Colourity: max 40 Refractive index n20d1.4350-1.4375 Characteristics: it can be mixed with water and dissolved by ethanol, ether, benzene, acetone, and other organic and inorganic compounds. It is a liquid with high boiling, powerful solvency, good electrical and stability properties. Package: galvanized iron drum of 200kgs net weight Galvanized iron drum of 200kgs net weight